4 ms·
The author of article stated it wrong. It's not the time-of-flight that is used as a proximity measure, it is the received signal strength (RSS). By limiting re
by klemenbr 4y ago
The author of article stated it wrong. It's not the time-of-flight that is used as a proximity measure, it is the received signal strength (RSS). By limiting response times to 8 ms just demands better relaying equipment. 1 nanosecond means around 30 centimeters in air and you need very precise clocks (or by measuring ToF by roundtrip times with very precise local timestamping of messages) and much wider bandwidth (500 MHz+) if you want to measure ToF with such precision. Bluetooth doesn't have that functionality.
- lelag 4y agoI would add that UWB chips do have that functionality so it would be nice to see them adopted widely in mobile phones. Currently only high-end devices have those chips in them (recent iphone and google/samsung flagships).